Document Type
Article
Department/Program
Physics
Journal Title
Physical Review Letters
Pub Date
7-2022
Volume
129
Issue
4
Abstract
We report a precise measurement of the parity-violating (PV) asymmetry APV in the elastic scattering of longitudinally polarized electrons from 48Ca. We measure APV=2668±106(stat)±40(syst) parts per billion, leading to an extraction of the neutral weak form factor FW(q=0.8733 fm−1)=0.1304±0.0052(stat)±0.0020(syst) and the charge minus the weak form factor Fch−FW=0.0277±0.0055. The resulting neutron skin thickness Rn−Rp=0.121±0.026(exp)±0.024(model) fm is relatively thin yet consistent with many model calculations. The combined CREX and PREX results will have implications for future energy density functional calculations and on the density dependence of the symmetry energy of nuclear matter.
Recommended Citation
Adhikari, D.; (...); Armstrong, David S.; and et al., Precision Determination of the Neutral Weak Form Factor of ^48Ca (2022). Physical Review Letters, 129(4).
https://doi.org/10.1103/PhysRevLett.129.042501
DOI
https://doi.org/10.1103/PhysRevLett.129.042501
Publisher Statement
This work is made available for educational and personal use only. Copyright is credited to the authors. Any other uses should be directed to the publisher.
